Swiss adventurer Louis Palmer has driven his Solar Taxi down under. Palmer recently drove across the Nullarbor Plain, arriving at Perth -- the 20,000 kilometer halfway mark in his mission to travel around the world to raise awareness of climate change and clean energy solutions.

The car gets half its solar power from panels mounted on a trailer towed behind the car. The other half is generated by solar panels on top of the headquarters of sponsor, Swisscom, then accessed via the grid, so that Palmer can run his vehicle at night and on cloudy days.

Palmer plans to end his tour at the Climate Change Conference in Poland in December.